satterstrom



(Model.) 2 Sheets-Sheet 2.

J. SATTERSTROM. Y

LOOK.

No. 425,461. Patented Apr. 15, 1890.

m: nouns zum col. Hammam wunmcreu, n. c.

PATENT Prion.

JOHN SATTERSTROM, OF BUFFALO, MINNESOTA.

LOCK.

SPECIFICATION forming part of Letters Patent No. 425,461, dated April 15, 1890..

Application filed August l, 1889. Serial No. 319,386. `(Model.)

To @ZZ whom it may concern:

Be it known that I, JOHN SATTERSTROM, a citizen of the United States, residing' at Buffalo, in the county of fright and State of Minnesota, have invented a new and useful Lock, of which the following is aV specification.

This invention relates to locks; and it has for its object to provide an improved lock which shall be simple, durable, and emcient.

Vith these ends in view the invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure l is a plan view of a lock embodying my improvements, the covering-plate of the lockcase having been removed and the bolts, of which there are two, being shown in an open position. Fig. 2 is a similar view showing the bolts shot. Fig. 3 is a similar view showing one of the bolts shot and the key engaging the pivoted latch upon said bolt in position for opening the latter. Fig. i is a sectional view taken longitudinally through one of thebolts on the line :r :c in Fig. 2. Fig. 5 is a sectional detail view. Fig. 6 is a detail view of one ot' the latches to engage the bolts and to retain the latter in position.

Like numerals of. reference indicate like parts in all the figures.

l designates the lock-case, and 2 2 are a pair of bolts arranged to slide in the same parallel to each other, each of said bolts being provided with a longitudinal slot 3 to receive a guide pin or stud et, which is mounted in the casing. Each of the bolts is provided in its outer edge with recesses 5, adapted to be engaged by the spring latches or detents 6, which are mounted pivotally in the casing and provided at their outer ends with lugs 7 to engage the said recesses, thus retaining the said bolts in either an open or a closed position according to the notch or recess engaged. Springs S are arranged to bear against the outer sides of the latches or detents and thus hold the same in engagement with the notches 5 in the bolts.

Suitably secured to the inner sides of the spring-latches 6 are plates 9, which extend under the bolts and the inner edges ot which, facing each other, are beveled, as shown at- 10. These are the edges which are engaged by the key in the act of opening or closing the bolts for the purpose of disengaging the spring-latches 6 temporarily from the said bolts, which are thus enabled to move inwardly or outwardly, as the case may require. The outer ends of the bolts are provided with recesses 1l, in which are mounted the pivoted tongues l2, vconsisting of angle-plates, the Outer ends of which are provided with beveled hooks 18. These plates, of which two are pivoted in the recess at the outer end of each bolt, serve, when the bolt is shot, to prevent its withdrawal, the hooks 13 at the outer ends of said Ytongues being adapted to enter recesses formed for their reception in the sides of the mortise which is preparedfor the reception of the outer end of the bolt.

Vhen the bolt is open, the-hooks 13 are Withdrawn into the recess at the outer end of the bolt. When the bolt is shot, the projecting ends of the inner arms of the angle-plates forming the pivoted tongues will strike against the inner side of the front edge of the lock-case, thus causing the angle-plates to turn from their respective pivots, and thus forcing the beveled hooks 13 outwardly from the outer ends of the bolts.

Mounted pivotally upon eachof the bolts is a latch l5, the front and rear-ends ofrwhich are beveled or curved, as shown at 16, and the inner side or edge of each of which is provided with an inwardlyextending tongue 17, the extreme end of which has a shallow recess 19. Each of the latches 15 is provided in front and in rear of the tongue 17, between said tongue and the beveled front and rear ends, with curved recesses 20. Each of the bolts is provided with a lug or stud 21, upon which is mounted a spring 22, adapted to bear against the straight outer edge of the adjacent latch l5, which is thereby held in normal position for operation'.

The bolts are normally forced in an ont- Ward direction by the action of springs 23, arranged adjacent to the said bolts and engaging the notches or recesses 2i in the outer edges ofthe latter.

designates a key, which may be adapted IOC Y to turn upon a key-post 26, and the bit of which is constructed to engage suitably-arranged wards 27.

The operation of my improved lock is as follows: When the bolts are open, they may be shot by inserting the key into the lock and turning it in either direction. The bit of the key will then engage the inner beveled edges of the plates 9, extending inwardly from the spring-latches 6, thus forcing the latter outwardly against the tension of the springs `8 and disengaging the lugs 7 from the recesses 5 in the edges of the bolts, which latter are then shot in an outward direction by the action of the springs 23. It is obvious that when, as in the drawings hereto annexed, two bolts are arranged parallel to each other the key must be turned a suiiicient distance vto engage both of the plates 9 in order to shoot both of the bolts. Vhen the bolts have been shot, the spring-latches or det-ents 6 engage the recesses 5 at the inner ends of the bolts, thus locking the latter and preventing their withdrawal. At the same time the inner ends or arms of the pivoted tongues or angle-plates 13 will rest against the inner side of the front wall of the lock-casing, thus preventing the said tongues from turning upon their pivots, and thus causing the hooks at the outer ends of said angle-plates to assist in preventing the withdrawal of the bolts, or, in the case 'of a trunk-lock or any lock of a similar character, to effect the actual locking. In order to open the lock, it is necessary after inserting the key into the lock to first turn it slowly in a forward direction until the bit engages the outer end of the tongue 17 of the pivoted latch 15. tion it willat the same time engage the plate 9, and thus release the latch or detent 6 from engagement with the corresponding bolt. This having been done,the key is turnedbac'lgwhen, by pressing or bearin g against the pivotallatch p 15, it will force the bolt in a rearwardor inward direction against the tension of the spring 23 until it has been fully withdrawn into the lock-case. The key then passes out of engagement with the 'plate 9, thus causing l the detent 6 to engage the notch at the outer end of the bolt, and thus retain the latter in the lock-case. The operation is then repeated with the other bolt, and the lock is then open.-

It Will be seen that if in the attempt. tounjlock the bolt the key is turned too far it will pass by the tongue 17 of the pivoted latch 15, and the bolt, 'when such Iis the case, cannot be opened until the key has been turned back to its original position, which may be readily done on account of the latch being pivoted, as 2 herein described. It is also obvious that if By turning the key to this posil Vvvitnesses:

the key is not turned far enough to engage the tongue 17 it will not remain in engagement with the latch 15 when it is turned back, and the bolt consequently will not be opened. It will then be seen that, inasmuch as the pivoted spring-actuated latches 15 present but little resistance to the turning of the key, it is important, or indeed necessary, that t-heperson attempting to open the look should be familiar with the mechanism thereof. At the same time, by" a person familiar with the mechanism, the lock is capable of being manipulated with great facility.

I have herein described my invention as applied to a lock having two bolts; but it is obvious that the invention is equally applica-' ble to a lock-case having a single bolt or a greater number than two, the necessary changes being of such a nature as to be readily understood by those skilled in the art to which the invention appertains. I would also have it understood that I do not limit myself' to the exact construction and arrangement of details herein described, but reserve the privilege of making any changes and'modications which may be resorted to without'departing from the spirit of my invention.

Having thus described my invention, what y I claim, and desire to secure by Letters Patent, is-,-

1; In al lock, the herein-described springactuated bolt provided with a recessl in its outer end, in combination with the L-sha'ped vor angular plates mounted pivotally in said recess and provided with beveled hooks at ,their outer ends, substantially as and for the purpose herein set forth.

2. In a lock, the combination of the sliding bolts provided with recesses at theirou'ter ends, the angular or L-shaped plates pivoted vin said recesses and having beveled hooksatk their outer ends, th'esprings forcing said latches normally in an outward direction, the

springactuated latches or Ydetents having plates extending under the bolts and provided rwith beveled edges to be engaged bythekey,

and the spring-actuated latches mounted pivotally upon the bolts and having curved In testimony that I claim the foregoing .as

my own I have hereto aixed my signatu rein presence of two Witnesses.

JOHN SATTERSTROM.

L. BoDIN, O. J. STEWARD.

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